Belt-pulley-clutch control for tractors



July 21 1925. 1,546,857

T. G.' MUELLER ET yAL BELT PULLEY CLUTCH CONTROL FOR TRACTORS F1155 nec. 15. 192s Max li/.71am H Enfmmiff Patented July 21, 1925.

UNITED ASTATES PATENT OFFICE.,

'rnnononn e. MUELLER, ALFRED n. BUoHrroLz, PAUL o. DALLMANN, GEORGE, c.

MOERSCHEL, MAX J, K'UJAWSKI, AND WILLIAM H. SCHMIDT, OF MILWAUKEE, WISCONSIN,v ASSIGNOBS T DALLMANN MACHINE & MFG. GO., (IVFlMIlrWALUIKIElE,`

WISCONSIN.

nriLr-:PULnny-cturcn ooN'rnoL non Tnec'rons.

Application led'IDecember 13, 1923. Serial No. 680,4.50.l

To all whom t 'may concern.'

Be it known'that we, THEonoRE G. Muni.- Lnn, ALFRED-R. BUoHHorz, PAUL O. DALL- MANN, Gnoncn C. Monusonnn, MAX J. KU- 6 JAwsKI, and WILLIAM H. SCHMIDT, all citizens of the United States, and residents of u Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Belt-Pul- 10 ley-Clutch Controls for Tractors; and we do hereby declare that the following is a full, clear, and exact` description thereof. f

This invention relates to a belt pulley clutch control and is more specifically adapted Jfor the connection vof the power shaft of a .tractor to the pulley shaft by means of which thepower from ay tractor engine is used for operating stationary machinery.

that disclosed in Patent '0. 1,480,021 for belt vpulley clutch control. for tractors, issued Jan. 8, 1924, to Claude C. Smith and has in general the same objectsas those disclosed in such application. 1

2 5 Further objects of this invention are to provide a unit which may be attached to the usual housing which surrounds the main power shaft of a tractor, which is adapted to permit instant operative connectionto be 39 established between the driv-ing shaft Aor power shaftvof thev tractor and the auxiliary or side pulley, which is so 1 constructed that maximum strengthis afforded against distortional stresses when the ulley is opera-- vtively driven, and in\ whic a sturdy and simple type of mechanismis provided.

Further objects are to provide a unit adapted for lattachment'.` as an-entity to the main housing of the tractor'and which is 40 so constructed that clutch mechanism is. pro- 'videdwhereby the driven land. driving shafts may be .operatively coupled or disconnected in which a minimum of bearings lis provided although the full strength of bearing suplport is afforded, and to. provide mechanism .whereby `a minimumof friction is present either when the pulley is*` being'activ driven or-when the pulley is idle."

An embodiment of the inventionl is shown-v Y in the accompanying drawings, in whiche- Figure 1 is a longitudinal sectitlal viewv i through the unit showing a fra power shaft or mainsha'ft of the tractor in dotted lines. I

Figure 2 is a transverse Sectional .view on` the line 2-2 ofFigurefLl .4.

Figure 3 is an enlargedfragmentary detail illustrating a" portion of the vsplined Joint.

The housing 5er casingwhichv encloses lthe main power shaft 6 of` the ltractor is provided with an aperture through which proeach of the portions 'fis provided with .a

r` fiange'.l Ihese anges .are slmultaneously secured byf means of a set of bolts 12 lwhich ent off. the `houslngof the tractor and indicating'the jects the inner portionTof-thehousing'of This invention is an im rovement overv ass through such liangesv and are threaded into the adjacent vortion of the main casing 5,-.-a suitable gas et being provided to secure an oil tight joint. If desired, the in ner portion `7 ymay be provided with a ertures to place it in communication with t e interior ofthe main casing or housing 5. A

driven shaft 13 is positioned in alignment with the driving shaft 9` and projects outwardly beyond the outer end of the` outer' housing 11 and carries the auxiliary or side pulley .14. This driven shaft is with' a reduced extension 15 which ts with- .in 'an elongated aperture 1 6 formedfin the driving shaft 9.

Itis -to be 'mated that this reduced 'exrovided tension projects, as shown in dotted lines in Figure 1, into the portion of the driving shaft 9 which is directly supported by the roller bearings 8. This construction furnishes a two bearing support for the driven shaft 13 and also furnishes an extended support for the driving shaft 9 without, however, requiring two additional bearings adjacent the meeting ends of the shafts 9 and 13.

The shafts 9 and 13 are provided with splines or ribs, as shown in the drawings, particularly Figure 3. If desired, the ribs or splines upon the shaft 9 may be provided with tapered ends adjacent the outer end of such shaft, as shown in Figure 3.

A collar 17 similarly contoured interiorly (2o-operates with the splined portions of the shafts 9 and 13. The collar is provided with a groove within which fits a U-shaped shoe 18 which conforms thereto and extends around such groove to an extent slightly greater than a semi-circle, so that it will be retained inl position by its inherent resiliency. This shoe is provided with laterally disposed trunnions 19 which are pivotally positioned within the apertured terminals of the forked arm 20 of the shift lever 21. This shift lever passes through a slotted opening 23 formed in -an enlarged upwardly extending projection 22 carried by the outer portion 11 of the housing, and is provided with a suitably shaped, preferably curved outwardly extending handle portion adapted for manual manipulation. This lever is slotted, as indicated `at 24, and cooperates with a in 25 fastened to the projection 22, as siown inFigure 1. If

Vdesired, a. removable pin 26 may be provided and may pass through appropriate apertures in therprojection 22 to retain the 'sleeve 17 in its retracted or inoperative position, as shwn in Figure 1. It is to be noted that the slot connection between the pin 25 andthe lever 21 allows for the longitudinal motion-'ofthe lever when it is shifted. .It

f is also to be noted that the projection 22 is provided with slanting inner surfaces to accommodate the full motion of the lever 21 without unduly increasing the size thereof and is so arranged. thaty thelever 21 substantially fills the outermost portion of the coutout 23 in all ofits positions, as shown in Figure 1.

It is to be noted that when the parts are in their inoperative position that the sleeve or collar 17 is fully retracted and is,out of contact with any portion of the shaft `9, a suitably extended spline lconnection being provided upon the shaft 13 to permit this complete retraction, of the collar. Thus when the shaft 9 is running idiarthere will be no frictional wear between the collar and the shaft 9 or betweenthe collar and the shaft 13. However, when the collar couples Maase? the shafts 9 and 13 it forms a second reinforce or joint between the shafts ;-the reduced extension forming one joint against lateral distortion and the collar forming an additional joint against such distortion.

It will be seen therefore, that a single bearing is provided by the housing for each of the shafts 9 and 13 and that a. common central 'being or support for the .juxtaposed ends of the shafts is secured by the reduced extension 15 and the bored out portion 1G, and that this joint is additionall reinforced by the sleeve 17 when the clutc is in closed position. This, in effect, constitutes a double joint when power is being transmitted, that is to say, when the shafts are subject to maximum distorting or deflecting stresses and, as stated, this construe tion dispenses with two additional bearings adjacent the meeting ends of the shafts.

It is to be noted that the parts run in oil as the housing 7 is provided with apertures which allow the oil within the housing 5 to flow into the housing of the clutch control. The outer endv of the housing 11 is closed by means of a disk 27 which is held tightly against the shoulder 28 of the housing 11. This disk is suitably apertured to permit the projecting portion of the shaft 13 to pass therethrough and bears against the inner portion of the ball bearing 8. Thus an oil tight joint is made for the unit and the parts are allowed to run in oil at all times without danger of any leaking.

It will be seen, therefore, that belt pulley clutch control for tractors has been provided, in which a maximum strength is secured, in which a minimum number of bear` ings are employed, in which Wear and frictional losses are minimized, and in which a sturdy and simple type of construction is provided.

Although the invention has been described in considerable detail, it is to be understood that the invention may be variously embodied and is, therefore to be limited only as claimed.

We claim:

A belt pulley clutch control unit adapted for attachment to a tractor, said unit comprising an inner housing member and an outer housing 'member having adjacent` flanges adapted for attachment to a tractor, said housing members each havin a. bearing adjacent its outer end, a driving shaft projecting through the bearing .of the inner housing member, a driven shaft aligned with' said driving shaft. and projecting through the bearing in the outer housing member and into close proximity to said first mentioned shaft, a pulley carried by the outer end of said driven shaft, ak sleeve slidably mounted upon said shafts and having' sphned connections therewith, a projection carried by said outer housing member'and wm ammm @ma mu hands ma M- wm? m *Mw www Mdwwke@ #und State of w J. Mmmwm.,

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